Weaving loom



Aug.12,1941'. H. PEL'C 2,252,470@

' Filed June 2o. 1940 i @fc5 Patented Aug. 12, 1941 wEAvlNG Loon Henri Pelc, Fllxecourt, France.' asignor to Socit dite: Saint Freres, Socit Anonyme, Paris,

France Application June zo, 1940, serial No. airs-7c In France July 18, 1939 2 Claims.

The present invention has for object improvements in weaving looms in order to obtain a uniform cloth of good aspect even when the threads are irregular or fiuiy or tend to twist. It is known that these defects of the threads would frequently determine irregularities in the classification of the warp threads at the place where the weft is inserted if said classification was not maintained or re-established owingto the use of a comb or equivalent members sliding between the warps. However, the mechanical construction of such members is not always simple nor easy, in particular on circular looms.

According to the present invention, the regular classification of the warp threads is ensured by means of movable members moving outside the shed parallelto the movement of the shuttle, in reverse direction to said movement, said members being numerous. flexible and arranged to rub against the vfabric in proximity to the last picks inserted. The friction of said members, called scrapers, produces a vibratory movement of the warps which tends to bring them back to their normal position. Practice allows of determining, according to the number and the coarseness of the threads and the strength of the fabric, what must be the number, the length, the size, strength and inclination of said scrapers.

Accessorily, on the threads can be caused to act a second series of scrapers also moving parallel to the shuttles, but in the same direction as the latter and slightly farther from the last pick iinserted. Owing to the regular classification of the warp threads by means of the scrapers according to the invention, which can be easily fitted up on circular looms as well as on rectilinear looms, defects in the weaving are avoided which might result from irregularities of the warps or from the presence of foreign bodies between them, and, moreover, the resistances opposed to the passage of the shuttles and of the members inserting the picks are reduced, which resistances tend to move the warps in the direction of displacement of the shuttles.

The accompanying drawing illustrates by way of example, an application of the scrapers according to the invention to a circular loom.

Fig. 1 is a perspective view diagrammatically showing a ring of scrapers arrangedaround the central well of the loom, as well as a shuttle and a few threads.

Fig. 2 illustrates on an enlarged scale, a few scrapers pressed against the fabric.

Fig. 3 is a diagrammatic partial section according to the axis of the loom.

I designates a metallic crown rotating about the well 2 in the direction 'F1 reverse to that Fa of the normal displacement of the shuttle I.

' which lays the weft 4 between the warp threads 5.

On the crown l are secured a series of scrapers 6 constituted by fine flexible rods which are' directed upwardlyand the ends of which press against the underside or the fabric or cloth at the place where the last picks have just been inserted. It may be advantageous to cause some of these scrapers to vact on the cloth already Iorme'd and others on this side of the last pick inserted.

Fig. 3 shows that a second crown l, carrying scrapers 8 similar to the preceding ones, can be arranged concentrically to the first one and outside the latter so that the scrapers rub against the warp threads at a certain distance from the last picks inserted; said crown 1 rotates in th same direction as the shuttle.

In a circular loom, in particular in a loom in which the warps are fed at right angles to the axis of the loom, the scrapers have the effect of causing each warp thread to return to its normal position of equilibrium, that is to say in the radial plane passing through the eye of the respective heddle, if said thread has been momentarily deviated therefrom by irregularities in the threads or for any other reason.

The means for guiding and driving the crowns l and l have not been shown in the drawing; the arrangement of said means can depend on the particular construction of the loom to which the invention is applied, but it is obvious that the choice and the fitting up of said means presents no particular diiiiculty for those skilled in the art.

The shape, position and method of actuating the supports for the scrapers can also be changed without departing from the invention; for instance, they can be secured to the periphery of rotating discs the axes of which are directed horizontally or obliquely according to planes passing through the axis of the loom, or at a slight distance, so that said scrapers act on the warps or on the cloth atthe same places as the scrapers 6. l illustrated; the axes of said discs may be mounted for instance on the rotating devices serving to push the shuttles along the circular guiding track and their rotation can be combined with that of said devices by means of any gears, endless chain or other suitable transmission means.

In the case of rectilinear looms the present invention can be also applied provided that the means ior controlling the scrapers are suited to the reciprocating movement of the shuttles. I claim: e

1. In a circular weaving loom, the combination oi! shuttles rotating in a constant direction about the axis oi' the loom and of a device for ensuring the regular classification and crossing of the warp threads on this side of the line4 of insertion of the last pick of the weft. comprising a ring rotating concentricaliy with the axis of the loom and in reverse direction to the shuttles and a series of ilexibie scrapers on said ring and the point oi' which is intended to engage the warp threads.

`2. In a circular weaving loom, the combination oi' shuttles rotating in a constant direction about the axis oi.' the loom and of a device for ensuring the regular classiiication and .crossing ofthe warp threads on this side ot the line of insertion of the last pick ot the wett comprising a ring rotating concentrically with' the axis of the loom and in reverse direction to the shuttles and a series of tlexible scrapers on said ring and the point of which is intended to engage the warp threads, near the last weit threads inserted, a second ringvconcentric with the axis oi' the loom and rotating in the same direction as the shuttle and a. second series ot iiexible scrapers on said second ring and also intended to engage the warp threads at a point suitably removed from the last 15 weft threads inserted.

AHitman: PELC. 

